| 摘要 |
A main control unit determines whether or not a previous version with which comparison is to be made exists regarding a document stored in a session storage unit. Next, confirmation is made regarding whether or not there is difference between both compared objects, and the control unit determines whether or not there is difference. The main control unit then executes an action embedded in the attributes of the object data. The object data with difference that has been saved in the session information storage unit is saved in a document information storage unit.
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